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Theoretical Study of Nuclear Density Distributions and Elastic Electron Scattering Form Factors of Some Proton Halo Nuclei (17Ne and 8B)

Authors: Ghaith N. Flaiyh --- Esraa F. Saeed
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2018 Volume: 59 Issue: 2B Pages: 847-855
Publisher: Baghdad University جامعة بغداد

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Abstract

Theoretical investigation of proton halo-nucleus (8B and 17Ne) has revealed that the valence protons are to be in pure (1p1/2)1 orbit for 8B and (1d3/2)2 orbit for 17Ne. The nuclear matter density distributions, the elastic electron scattering form factors and (proton, charge, neutron and matter) root-mean square (rms) are studied for our tested nuclei, through an effective two-body density operator for point nucleon system folded with two-body full correlation operator's functions. The full correlation (FC's ) takes account of the effect for the strong short range repulsion (SRC's) and the strong tensor force (TC's) in the nucleon-nucleon forces. The effective two-body density operator is produced and used to derive an explicit form for ground state two-body nucleon density distributions (2BNDD's) applicable for proton – rich halo nuclei and Fortran 95 programs are utilized to obtain theoretical values of our calculation. The effect of the TC's and SRC's on the ground state also calculated. 2BNDD's obtained within the two- frequency shell model (TFSM) approach, the elastic charge scattering form factors F(q)'s of proton halo nuclei are studied through Plane Wave Born Approximation (PWBA) .


Article
Nucleon momentum distributions and elastic electron scattering form factors for 48Ti and 54Fe nuclei
توزيعات زخم النيكليون وعوامل التشكل للاستطارة الالكترونية المرنه للنوى 48Ti و 54Fe

Authors: Ahmed A. Hamza احمد عدنان حمزه --- Ghaith N. Flaiyh غيث نعمة فليح
Journal: Iraqi Journal of Physics المجلة العراقية للفيزياء ISSN: 20704003 Year: 2014 Volume: 12 Issue: 24 Pages: 100-109
Publisher: Baghdad University جامعة بغداد

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Abstract

The nucleon momentum distributions (NMD) for the ground state and elastic electron scattering form factors have been calculated in the framework of the coherent fluctuation model and expressed in terms of the weight function (fluctuation function). The weight function has been related to the nucleon density distributions of nuclei and determined from theory and experiment. The nucleon density distributions(NMD) is derived from a simple method based on the use of the single particle wave functions of the harmonic oscillator potential and the occupation numbers of the states. The feature of long-tail behavior at high momentum region of the has been obtained using both the theoretical and experimental weight functions. The observed electron scattering form factors for 48Ti and 54Fe nuclei are in reasonable agreement with the present calculations throughout all values of momentum transfer

تم أستخدام أنموذج التموج المتشاكه في حساب كل من توزيعات زخم النيكليونات النووي للحالة الأرضية وعوامل التشكل للأستطارة الألكترونية المرنة, حيث تم التعبير عنهما بدلالة دالة تسمى دالة التموج. لقد تم التعبير عن دالة التموج بواسطة توزيعات كثافة النيكليونات وتم حسابها من النتائج النظرية والعملية لتوزيعات كثافة النيوكليونات. ان حساب توزيعات كثافة النيكليونات يعتمد بالأساس على كل من اعداد اشغال الحالات النووية وعلى الدوال الموجية للجسيمة المنفردة المتواجدة في الجهد التوافقي.تميزت نتائج توزيعات زخوم النيكليونات (المستندة على دالة التموج النظرية والعملية) بصفة الذيل الطويل عند منطقة الزخم العالي. أظهرت هذه الدراسة بأن عوامل التشكل النظرية تتفق مع النتائج العملية للنوى ( 48Tiو54Fe ).

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